Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 13 - Temperature and Kinetic Theory - Questions: 4

Answer

That quantity is the initial length of the object.

Work Step by Step

This is stated in the book on page 364 where this equation (13-1) is introduced. Having said that, unless the temperature change is very large, little error is introduced by using the final length in that equation.
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